Revert 241425 "Aura: Don't create GL context for CreateSharedSur..."

Speculative revert for browser_tests failure on Linux Aura Tests
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura%20Tests/builds/207

> Aura: Don't create GL context for CreateSharedSurfaceHandle()
> 
> The context is used for blocking renders that are trying to create
>  a context after the GPU process crashed through comparing
>  gpu process IDs.
> 
> Remove this code as we can handle SwapCompositorFrame
>  more gracefully nowadays after resources were lost.
>  But still fail renderer view context creation when
>  gpu browser compositing gets turned off.
> 
> BUG=270179
> 
> Review URL: https://codereview.chromium.org/111063003

TBR=sievers@chromium.org

Review URL: https://codereview.chromium.org/118003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241508 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241508